Microstructure and Wear of Materials
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Contents:
The high temperature impact-slide wear resistance of laser cladded and plasma sprayed coatings were studied.
Purchase Microstructure and Wear of Materials - 1st Edition. Print Book & E-Book. ISBN , Read the latest chapters of Tribology Series at giuliettasprint.konfer.eu, Elsevier's leading platform of peer-reviewed scholarly literature.
The experimental results showed that compared with that of plasma sprayed coating, the laser cladded coating has higher microhardness, more uniform microstructure, smaller grain size, lower dilution rate, and fewer pores and impurities. The experimental results also showed that the weight loss of plasma sprayed coating during the high temperature impact-slide wear is two times larger than that of laser cladded coating.
The macroscopic qualities of the coatings were analyzed and the process parameters and the clad materials were optimized. The microstructure of the coatings was characterized by SEM. The microhardness of the coatings was examined using HXD microhardness tester.
Processing, As-Cast Microstructure and Wear Characteristics of a Monotectic Al-Bi-Cu Alloy
The wear properties were examined using M wear test machine. The results show that the clad materials and the process parameters are the important factors to influence the quality of laser cladding. The results show that the excellent metallurgical bonding has formed at the interface between substrate and laser cladded coatings. Cellular crystal at the bonding zone, cellular dendrite at the central zone and reticular equiaxed crystal near top surface were observed in Nd:YAG laser cladded coating, while the typically hypoeutectic character was found in CO 2 laser cladded coating.
The microhardness of H13 steel is greatly improved by laser cladding, however the microhardness of the CO 2 laser cladded coating is even higher than the Nd:YAG laser cladded coating. The microstructure and microhardness of the cladding layers were analyzed by scanning electron microscopy SEM and microhardness tester.
The microstructure of the coatings was characterized by SEM. Depending on the nature of the molecule, these structures will either be small globules called micelles or be membranes. Results and Discussion 3. Example of this lack of penetration zones are the black areas indicated by arrows as shown in Fig. These carbides give the steel a significantly higher wear resistance. This content was uploaded by our users and we assume good faith they have the permission to share this book. To acquire micrographs, optical as well as electron microscopy are commonly used.
The grain abrasion resistance of the cladding layers is also discussed. The grain abrasion resistance of the coating is also discussed. The results showed that excellent bonding between the coating and the AISI steel substrate was uniform, continuous and almost defect-free.
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Quaresma, L. A , , 41 , p — CrossRef. Savaskan and O. Dong and H. Wang, F. Cao, Z. Chen, H. Lu, X. Yan and J. Online since:. May Cited by. Related Articles. Paper Title Pages. Abstract: Laser cladding of Co-base alloy on the sealing surfaces of nuclear valve clacks has been performed with a 5KW CO2 transverse flowing laser. The laser cladding was compared with plasma spraying. Both laser cladded and plasma sprayed zones were characterized by optical and scanning electron microscopes. The high temperature impact-slide wear resistance of laser cladded and plasma sprayed coatings were studied.
The experimental results showed that compared with that of plasma sprayed coating, the laser cladded coating has higher microhardness, more uniform microstructure, smaller grain size, lower dilution rate, and fewer pores and impurities.
Microstructure and Wear of Materials
The experimental results also showed that the weight loss of plasma sprayed coating during the high temperature impact-slide wear is two times larger than that of laser cladded coating. The macroscopic qualities of the coatings were analyzed and the process parameters and the clad materials were optimized. The microstructure of the coatings was characterized by SEM. The microhardness of the coatings was examined using HXD microhardness tester. The wear properties were examined using M wear test machine.
The results show that the clad materials and the process parameters are the important factors to influence the quality of laser cladding.